#ifndef _HEADER_FILE_
#define _HEADER_FILE_
#include<stdio.h>
#include<conio.h>
#include<iostream.h>
#include<string.h>
#define LENGHT(x) sizeof(x)/sizeof*(x)
#define bai1(x) printf("\n%d",second(x,n))
#define bai2(x) printf("\n%d",tong(x,n))
#define bai3(x,d,c,n) puts(f(x,d,c,n))

int second(int a[], int n);
int tong(int a[], int n);
char *f(char a[],int d, int c, int n);
#endif

